NAPL Compositional Changes Influence Partitioning Coefficients

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• 作者：Cindy M. Lee ; Sarah L. Meyers ; Charles L. Wright ; Jr. ; John T. Coates ; Patrick A. Haskell ; and Ronald W. Falta ; Jr.
• 刊名：Environmental Science & Technology
• 出版年：1998
• 出版时间：November 15, 1998
• 年：1998
• 卷：32
• 期：22
• 页码：3574 - 3578
• 全文大小：63K
• 年卷期：v.32,no.22(November 15, 1998)
• ISSN：1520-5851

文摘

Partitioning interwell tracer tests (PITTs) that weredeveloped by the petroleum industry are being used tocharacterize the extent and amount of subsurfacecontamination by nonaqueous phase liquids (NAPLs). Apromising application of PITTs is to estimate the volume ofcontamination removed by various remediation technologiesby conducting the tests before and after remediationefforts. Laboratory experiments with a light NAPL fromHill Air Force Base, UT, the site of the SERDP demonstrationof innovative technologies, indicate that the type ofremediation technology used changes the partitioning ofthe tracer compounds between the NAPL and the aqueousphase. Partitioning coefficients (K_nw) that were measuredby static and dynamic methods showed a statisticallysignificant change in value after the NAPL was treated inbatchwise washes with a cosolvent that simulatedenhanced dissolution. In contrast, the value of K_nw showedlittle change before and after the NAPL was treated in acolumn with a cosolvent that simulated mobilization. Theresults indicate that PITTs could significantly underestimatethe volume remaining of a complex NAPL like the HillAFB material for an operation that employs the solubilizationmechanism without a corrected K_nw for the post-treatment test.